Resilient shaft coupling



Aug. 30, 1932. J. w. AUREN RESILIENT SHAFT COUPLING Filed Dec. 19, 1930 INVENTOR fo/1n M/ufen.

ATTORNEY Patented Aug. 30, 1932 emerso STATES PATENT OFFICE JOI-IN w. AUREN', OF Fornisce` HILLS, PENNsrLvANIA, AssIGNOR To lwascLINcrIIoUsn ntnc'rnc a MANUFACTURING cO1vI1 ANYA CORPORATION OF PENNSYLVANIA RESILIENT SHAFT COUPLING- Appiicationriea December 19, i930. serial No. 503,416.

silience in the transmission Vof power and.

which inherently tends to damp out vibrations set up by abrupt fluctuations in either the power or the load.l

Y Another object of my invention is to pror vide a couplingk of the type described which compensates for misalignment between the coupled shafts and which is simple in. design, reliable in operation, and can be economically manufactured.

Other objects of'my invention will'become Y evident from the following detailed description taken inconjunction with the following drawing, in which j Figure 1 is a longitudinal sectional vlew,

of a preferred form of coupling constructed `in accordance with this invention.

CII

Fig. 4 is a view in sectional elevation show-l ing details of an end securing stud for the torsion spring of thev coupling. y Y

Referring to thel drawing, particularly Fig. 1, it willbe seen that the coupling comprises a driving member 10 and a driven member 11. As shown the driving` member is keyed to a driving shaft 12 in the usual manner by means of a key 13. The driven member is splined to the end of a driven shaft 14 by means of a feathered key 15 so that it rotates with the shaft and is free to slide in an axial direction on the shaft, for

a purpose to be made evident. It will be` In order to provide forangular or torsional VYflexibility in the coupling, a coiled torsion springl is utilized to connect the driving and the driven members. As shown, the spring is rectangularV in cross-section and wound on edge into coils the turns of which are of substantially equal diameter, with little or no space being allowed betweenthem. It will be understood that lthe dimensions and number of turns in this spring are dependent ,upon the torque -capacity :and flexibility characteristicsl desired inthe coupling.

To permit compensation .for shaft misalignments, the ends ofthe torsion spring 16 are pivotally connected to the-driving member 10 and driven member V11.v As illustrated, l

1 16 is inserted into the stud slot and bent at a right angle, to contact with a portion of the stud, and is fixedV thereto by a rivet 19.

`A bushing 20 is mounted in each hole 18, already referred to, to provide a close fitting connection'between the stud 17 andthe coupling member. They may be replaced should this part ofthe device be subjected to excessive wear.

To provide for the damping out of torsional vibrations, such as are set upin flexible couplings when the power or the loadV fiuctu- `attached to each end ofthe spring is a stud ates abruptly, I incorporate in my device means for compressing the torsion spring 16, to bring the adjacent turns into contact. Frictional resistance 'to the relative movement between adjacent turns is thus set up and any torsional vibrations are thusy greatly minimized or completely damped out.

As illustrated, the spring 16v may be com pressed by fixing to the driven shaft 14, in spaced relation tothe driven member 11, a collar 21 by means of a pin 22.. A coil spring l23 in compression. is mounted between the collar and the 'driven' member. Since the ldriven member 11 is splined.y to the driven shaft it is biased- :aga-inst the spring 23 causing frictional engagement between the turns im:xconnectisaidf'drivingf'aiiddriven members. a

of the spring With the results and advantages collar fixed to the driven shaft and a coil already explained. spring held by said collar in compression The torsion spring is protected from unsafe against the driven member to compress the strain, such as might result from severe torque torsion spring to bring adjacent turns thereof n overloads,fby providing an angular displaceinto contact for causing frictional resistance ment*limiting-projection, upon each oovqalingfftoaA relativeiamovementrf therebetween.

' i member, as shown, at 24 on the'driving niein-l L 5. Afsliaft coupling, .for-"connecting a drivber, and at on the driven member.. Itwllmingshaft and a driven shaft, comprising in f be seen that lthese projections Will be brought `combination a driving member and a driven into contactwhen the coupling membersrare mem^ber,-a torsion` spring -forr'resilientlyi Conlu angularly"displaced-beyond a'predertermined necting said driving anfddrivenmembers, said amount. Y Y u j springbeing formed from material yofreetan- While I have shown and described a certain gular crosssection int-o coils having adjacent specific embodiment of my invention, I aim-@turnsotsubstantially equal diameters and atl! fully aware that many modifications thereof tached at its ends to the driving and driven ,.fr:arepossibleri Myfimfention; therefore, is notfi:membersfrespeetivelyf through; pivotal eontotbef -restrictedifeifqeptinsofar as iswnecessi-f :i neetingi imeans, loner ofi said@ membersi-:being tatd by thepuior fart'andby theispi-ritotathe airvirmly-Slreyed toioneof said shaftssthe-:other a; :7.-appendedaclaims l of said members beingz'spliqied tosthelother of l claim -aas-my invention: f saidr sha'tsw to'fatotatez'ftlierewthifandto be l. Aishaft coupling comprising in ,combina-1" r tree toarrially:slidel thereon, :afcollarslixed to r tionza driving member. anda 'driven-:memberethailfasisnamedi shaftfand 'af eoillspningfnheld 11 ai ftorsionf,` ispringgitor f resilient-1yrfeonnectingrfbysaidfcollarin enmpres'soniagainstethe last- 5 n .said` driving and ,drivenmembers said sprin g) namedammber to compressithertorsionffspring l 251 being forme-df :from materiali? ofl :rectangular: nandf'bringadj'acentsturns :thereon into -eon 'if erossfsee-tion into*coilsrhavingadjacentfturnsictaet ifor eausi'nglfrictionaliresistanceitorela- A `of substanti'allyfequalt dia-metersglarrd means) tive.miorrementtherebetween.

y-z'fonLcontinuouslys eompressingisaid'spring axj 6. A. shaft coupling,.-foreonnectinga driv- 1i iallytofbringadjac'entturnsthereofinto Conexin-gisliatiandfadriven, slaaf-t5 comprising in 3itact to causefriotionalifresistancer torelative'zicombiiiationwardriving membemand'aldriyeii i v,r.f movement thenebetween r ff sm'ember,iartonsionspring'ffor Inesili-en-tlyfAeon- 2. Ashafftcouplingcomprising in-,combinafzvnectingisaid:l drivingaand drivenkmembers, 1, ,tionr a Y drivingfmembers and "a"driven:memberf, -i saidispringf:l beingyormedfWitheaxial-ly-eonaftorsionvspringu orlresilienftlyn connecting tactable adjacent turns, meansffon-attaohing fasaiddriving.'and'driven member.s,said springsutheiends otthe;springetosaiddriving and a 1pivotalziconneetionsfiforc'aittaehingfftheendsmmembepsfibeing511111155?kyedftosthe @ne of iota the springe,` to said;drvingiandfdriiven said shafts, the other otxsaid membersfbeing membersrespectively; andf means :tor continus" =s`plined toathek other ot; said:- shafts torrotate -xiadjacent turnsfth'ereofl :into eont'acti to`l cause on, a @Olpffxed to thesrlast-.namedshaftnd Aif"oz'rictiona'l: :resistance: tor;-relativeim-ovement; ra'noilzspringaheldiby said'collar in compresil:there'rlcsetwen. i sion against the last-named membertofcom- I i i'. 3.- Ash'afftoouplingicomprising innombina-ff:press@thertorsionyspring to bring gadjaeent tion a driving member and a 'drivenunemben turns thereof into Contact fori,causingfriE a 'fcoied torsion--spning'ihavingfaxially con-i: itionalresistanoeto-relativemovementithere- Vi-ntaetable adjaeentaturns; forfresil-iently'iicone:izbetfweem'iand axial projectionsiomthei driv- :grne'cgtingsaidrdriving and -fdrizven members, ing and drivemmembershdsposed tozengage f aXial .projections {onvthe driving -and ydriven ione'i'another when4 *the :mglllll dspamen' 1 members disposed toi; engageA one another@ Teaches@ `preletfnm'ined-Maflue; 1 3'*- When theangular displaeement offthe mem- '.-I-rIn-testimonly Whereozf, Lhaveihereunto subb ers .reaches a..A pre,determined7 wallie, andeY ,iger-,ined 1my'namn thisl 12th day r`of December, meansdor., continuously,nompressngsSaid;1930. i' l Vspringaxially to forceladjacentturns thereof e lJOHNNV..

into Contact.V to, cause rictional resistance to Y Y j relative movementof the turns.

4:.v A .slialt coupling, in combination with ai., drivingI shaftand,adrivenlL shaft, com-- -prising adrivingme'mber and adrive'n'mem- L' bei", 'said ,driving memberxbeingflirmly 'keyed to the driving shaft,said'driven'm'emberbe- Afing splined to thedriven shaft tofrotate there'- I lwithvand'ftoV bev-'tree to .axially rslidef thereon, fa' coiled:itorsionispringdisposed to Lresilie'ntly'` uhaving; axially contacta'ble 1 f adjacent; turnsgz gdrliventeiremfbersrfrespectivelyfvonf- Olffff-said 

